package com.servlet;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.Part;

public class InitParamServlet extends HttpServlet {

    /**
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code>
     * methods.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
         response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        try {
            response.setContentType("text/html;charset=UTF-8");

            for (Part p : request.getParts()) {
                String ftype=this.getInitParameter("FileType");
                if (p.getContentType().contains(ftype)) {

                    String fname = getFileName(p);

                    p.write(fname);
                    System.out.println(fname);
                    System.out.println(p.getContentType());
                }
            }
        } catch (Exception e) {
            System.out.println(e.toString());
        } finally {
            out.close();
        }
    }
 private String getFileName(Part part) {

        String header = part.getHeader("Content-Disposition");
        String fileName = header.substring(header.indexOf("filename=\"") + 10, header.lastIndexOf("\""));
        fileName = fileName.substring(fileName.lastIndexOf("\\") + 1);

        return fileName;
    }
    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP <code>GET</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Handles the HTTP <code>POST</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Returns a short description of the servlet.
     *
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>

}
